Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
The sound isn't the best but its fairly decent. Usually have trouble keeping these types of earphones in the ear but managed to place it in a way keeps them in. Cable could be slightly shorter for my head anyway but doesn't get in the way.